EP4307018A1 - Grille lumineuse à mesure de distance - Google Patents

Grille lumineuse à mesure de distance Download PDF

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Publication number
EP4307018A1
EP4307018A1 EP22185045.6A EP22185045A EP4307018A1 EP 4307018 A1 EP4307018 A1 EP 4307018A1 EP 22185045 A EP22185045 A EP 22185045A EP 4307018 A1 EP4307018 A1 EP 4307018A1
Authority
EP
European Patent Office
Prior art keywords
transmitter
elements
receiver
qualified
designed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22185045.6A
Other languages
German (de)
English (en)
Inventor
Andri von Allmen
Nannan Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cedes AG
Original Assignee
Cedes AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cedes AG filed Critical Cedes AG
Priority to EP22185045.6A priority Critical patent/EP4307018A1/fr
Priority to PCT/EP2023/069696 priority patent/WO2024013386A1/fr
Priority to PCT/EP2023/069697 priority patent/WO2024013387A1/fr
Publication of EP4307018A1 publication Critical patent/EP4307018A1/fr
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers

Definitions

  • the invention relates to a light grid for object recognition.
  • Light grids are known from the prior art, which have a transmitter bar and a receiver bar and between them form a grid of light rays for object recognition.
  • one or both strips of the light grid can be attached to the sliding door or doors of an elevator car in order to detect the passage of an object through the open door area.
  • the light grid according to the invention is a light grid for determining the distance between the transmitter and receiver bars, with a transmitter bar with one or more transmitter elements that emit radiation with a certain intensity, with a receiver bar with one or more receiver elements that receive the radiation of an assigned transmitter element, and with a control device for controlling the transmitter elements and / or the receiver elements and for evaluating the receiver elements, the transmitter element and the receiver element or at least one of the transmitter elements and / or at least one of the receiver elements being designed as qualified transmitter and receiver elements, the qualified Transmitter element or the qualified transmitter elements are designed to emit different intensities and / or the qualified receiver element or the qualified receiver elements are designed to apply different amplifications and output an intensity value for the received and amplified radiation, and the control device is designed to use different combinations of To control intensities and amplifications of the qualified transmitter and/or receiver elements and a distance value depending on the To determine the sum of the resulting intensity values of the controlled combinations.
  • the light grid in particular the transmitter and receiver bar, preferably has at least one or more further transmitter and receiver elements, which are each designed as simple transmitter elements and simple receiver elements and which are each designed as a light barrier and which preferably do not contribute to the combinations and / or from which the distance value is not determined, and/or which are used for object detection, and/or whose simple transmitter elements emit at least one intensity as the qualified transmitter elements and whose receiver elements have at least one gain as the qualified receiver elements.
  • the light grid can be used for object detection.
  • This can have the advantage that not all transmitter and receiver elements have to be qualified, which reduces the complexity of the light grid and saves costs.
  • such an exemplary embodiment of the invention also enables a compromise between precise object recognition and a cost advantage, which comes about because not all transmitter or receiver elements have to be equipped with the same functions, but individual elements can also be equipped with fewer functions more cost-effectively.
  • control device is designed to control the combinations one after the other in a sequence and in particular to repeat the sequence periodically and in particular to determine the sum of the controlled combinations of a sequence and in particular to determine a distance value for each sequence and / or all different combinations of intensities and to control amplifications of the qualified transmitter and/or receiver elements, but in particular without using the highest intensity of the qualified transmitter elements for the combinations, and/or using those intensities and amplifications of the qualified transmitter and receiver elements for object recognition which correspond to the intensities and gains of simple (unqualified) transmitter and/or receiver elements.
  • the one or more qualified transmitter elements are designed to each individually emit a plurality of different intensities, and/or to emit intensities that differ from one another, and/or to each emit an equal intensity, which in particular is the highest intensity and in particular corresponds to the intensity of the unqualified transmitter elements.
  • the one or more qualified receiver elements are designed to each individually apply several different amplifications, and/or to apply the same different amplifications, and/or to each apply an equal amplification, which in particular is the highest, and in particular the amplification of the unqualified, i.e. corresponds to simple receiver elements.
  • the light grid preferably has three qualified transmitter and receiver elements and additional simple transmitter and receiver elements, which do not contribute to the combinations and/or from which the distance value is not determined.
  • the one or more qualified transmitter elements are designed to each emit three intensities, one intensity being the same as the intensity of the unqualified, i.e. simple transmitter elements which are provided for object recognition, and two intensities being lower than the one and each being the same differ from all other intensities.
  • the one or more qualified receiver elements are designed to each apply the same two different amplifications, the higher amplification corresponding to the amplification of the unqualified, i.e. simple, receiver elements which are intended for object recognition.
  • control device is designed to form twelve combinations of the three qualified transmitter and receiver elements, the two overall different, lower intensities of the qualified transmitter elements and the two different, each equal, amplifications of the receiver elements.
  • the control device is preferably designed to use those intensities and amplifications of the qualified transmitter and receiver elements for object recognition which correspond to the intensities and amplifications of unqualified, i.e. simple transmitter and/or receiver elements.
  • the light grid preferably has a transmitting device which is designed to send the distance value wirelessly.
  • Fig. 1 shows a light grid 20 according to the invention with the transmitter bar 21 and the receiver bar 22.
  • the transmitter bar 21 has three qualified transmitter elements 31 and further unqualified transmitter elements 33, onto which IR radiation can emit with a certain intensity.
  • the receiver bar 22 has three qualified receiver elements 32 and further unqualified receiver elements 34.
  • the transmitter bar and receiver bar are each arranged vertically and parallel to each other and opposite each other at the same height.
  • Each qualified transmitter element 31 is assigned a qualified receiver element 32 at the same height and together these form a horizontal transmitter steel 30.
  • the light grid 20 also has a control device 35.
  • Fig. 2a to 2c show the light grid 20 of Fig. 1 on a double sliding door 10 of an elevator car.
  • the transmitter bar 31 is attached to one wing of the double sliding door and the receiver bar 32 is attached to the opposite wing of the double sliding door.
  • the rest of the arrangement is as in Fig. 1 .
  • the transmitter bar 31 and the receiver bar move with the double sliding doors and remain arranged parallel and at the same height to one another, so that the light beams remain horizontal and assigned to the corresponding qualified transmitter and receiver elements. They decrease their distance along with doors when the doors close, and they increase their distance along with the doors when the doors open.
  • the distance between the transmitter and receiver bars corresponds to the distance between the two leaves of the double sliding door up to a constant factor.
  • Fig. 2a shows the opened door.
  • Fig. 2b shows the half-closed door.
  • Fig. 2c shows the closed door.
  • the unqualified transmitter elements transmit with the intensity Tx:High and the unqualified receiver elements have the two gains Rx:High and Rx:Low. Rx:Low is lower than Rx:High.
  • the reinforcements are applied simultaneously and evaluated separately.
  • the first qualified transmitter element T1 can transmit the intensity T1:Low1, T1:Mid1, or T1:High
  • the second qualified transmitter element T2 can transmit the intensity T2:Low2, T2:Mid2 or T3:High
  • the third qualified transmitter element T3 can send the intensity T3:Low3, T3:Mid3 or T3:High.
  • the intensities Tx:High, Tl:High, T2:High and T3:Hight are the same. All other intensities are lower.
  • the sequence of the strengths of the intensities is ascending: T1:Low1 ⁇ T2:Low2 ⁇ T3:Low3 ⁇ Mid1 ⁇ Mid2 ⁇ Mid3 ⁇ Tx:High.
  • the three qualified receiver elements R1, R2, R3 can each apply the gains Rx:Low or Rx:High.
  • the control device controls the unqualified transmitter and receiver elements so that Rx:High is applied for distances over 1 m and Rx:Low is applied for distances under 1m, the latter so that reflection can be avoided.
  • Fig. 3 is a diagram 40 for the intensity as a function of distance and shows the measurement course of a combination.
  • the X-axis 41 shows the distance from the transmitter bar to the receiver bar.
  • Point 42 shows the minimum distance and
  • Point 43 shows the maximum distance that can be evaluated.
  • the Y-axis 44 shows the intensity value output by a qualified receiver element for a particular combination.
  • the measurement curve 51 shows an example of a combination with medium intensity of the qualified transmitter element and medium gain of the qualified receiver element.
  • the measurement curve 51 shows a very steep course at medium distances and is in saturation at shorter distances and without a signal at longer distances. The measurement curve therefore only shows a small distance range with good resolution.
  • Fig. 4 is a diagram 40 according to Fig. 3 and shows an overlay of all twelve measurement curves 52 for the twelve combinations.
  • the different intensities and the gain Rx:Low are selected so that a largely uniform sequence of steep curves of the measurement curves is achieved over the distance.
  • Fig. 5 shows a diagram for the sum intensity values of all twelve combinations.
  • the X axis is analogous to that Fig. 3 .
  • the Y-axis shows the sum 71 of the intensity values of all twelve combinations Fig. 4 .
  • the sum shows a largely linear course over the entire distance.
  • the control device adds the measured and amplified intensity values of the twelve combinations of a sequence and outputs a distance value depending on the sum.
  • the control device repeats the sequence periodically and periodically outputs the distance value.
  • the opening movement of the car door of an elevator can be measured using the light grid according to the invention.
  • the distance from movable boundaries of a passage to be monitored by a light curtain can be measured by the light curtain itself.
  • the light grid according to the invention can have a transmitter device which transmits the distance value wirelessly, and in particular transmits it to a web cloud.
  • a transmitter device which transmits the distance value wirelessly, and in particular transmits it to a web cloud.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
EP22185045.6A 2022-07-14 2022-07-14 Grille lumineuse à mesure de distance Pending EP4307018A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP22185045.6A EP4307018A1 (fr) 2022-07-14 2022-07-14 Grille lumineuse à mesure de distance
PCT/EP2023/069696 WO2024013386A1 (fr) 2022-07-14 2023-07-14 Grille lumineuse à fonction de mesure de distance
PCT/EP2023/069697 WO2024013387A1 (fr) 2022-07-14 2023-07-14 Grille lumineuse avec fonction de mesure de distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22185045.6A EP4307018A1 (fr) 2022-07-14 2022-07-14 Grille lumineuse à mesure de distance

Publications (1)

Publication Number Publication Date
EP4307018A1 true EP4307018A1 (fr) 2024-01-17

Family

ID=82608203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22185045.6A Pending EP4307018A1 (fr) 2022-07-14 2022-07-14 Grille lumineuse à mesure de distance

Country Status (2)

Country Link
EP (1) EP4307018A1 (fr)
WO (2) WO2024013386A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050133702A1 (en) * 2003-12-19 2005-06-23 Sick Ag Method and apparatus for monitoring surfaces
US20110204211A1 (en) * 2010-02-25 2011-08-25 Sick Ag Optoelectronic sensor
DE102012109985A1 (de) * 2012-10-19 2014-05-08 Sick Ag Optoelektronischer Sensor und Verfahren zur Veränderung von Sensoreinstellungen
US20160178794A1 (en) * 2014-12-22 2016-06-23 Rockwell Automation Technologies, Inc. Light curtain sensitivity optimization
CN111273371A (zh) * 2020-03-05 2020-06-12 广州安协科技股份有限公司 对射光幕、检测系统以及对射光幕的安装检测方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050133702A1 (en) * 2003-12-19 2005-06-23 Sick Ag Method and apparatus for monitoring surfaces
US20110204211A1 (en) * 2010-02-25 2011-08-25 Sick Ag Optoelectronic sensor
DE102012109985A1 (de) * 2012-10-19 2014-05-08 Sick Ag Optoelektronischer Sensor und Verfahren zur Veränderung von Sensoreinstellungen
US20160178794A1 (en) * 2014-12-22 2016-06-23 Rockwell Automation Technologies, Inc. Light curtain sensitivity optimization
CN111273371A (zh) * 2020-03-05 2020-06-12 广州安协科技股份有限公司 对射光幕、检测系统以及对射光幕的安装检测方法

Also Published As

Publication number Publication date
WO2024013387A1 (fr) 2024-01-18
WO2024013386A1 (fr) 2024-01-18

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